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In a physics class Alex and Mike were performing a hypothesis test concerning the mean amount of static electricity in a capacitor. Both students computed the same test statistic but Alex's result was to reject the null hypothesis while Mike's result was not to reject the null hypothesis. Which of the following is NOT a possible explanantion for why the students had different conclusions?
Alex was testing at the 0.05 significance level and Mike was testing at the 0.01 significance level.
Alex was performing a one-tail test and Mike was performing a two-tail test.
Alex considered the test statistic to be z while Mike considered the test statistic to be t.
Alex performed an upper-tail test while Mike performed a lower-tail test.
Alex computed the p-value of the test statistic while Mike compared the test statistic to the corresponding critical value from the t-Table of Critical Values.
Determine the probability that pregnancy will (a) last more than 300 days; (b) less than 240 days; (c) between 250 and 282 days.
If the net regression coefficients in the population are significantly different from zero, what can be included? No relationship exists between the dependent variable and any of the independent variables.
the life spans of car batteries are normally distributed with a mean of 44 months and a standard diviation of 5
Their probabilities for success on a single play are p for A and q for B, and successive plays are independent. Determine the probablity that A wins the contest given A plays first.
question although the phenomenon is not well understood it appears that people born during the winter months are
Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to parts (a) and (b) to someone who has never had a course in statistics.
a doctor wants to estimate the hdl cholesterol of all 20-to 29- year-old females. how many subjects are needed to
Standard deviation of 0.17 ounces, assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more than 12.2 ounces?
Monthly sales figures for store are as follows. Determine the:Mid-rangeStandard Variance.
a sample of n 16 individuals is selected from a normal population with a mean of micro 48 and a standard deviation of
Although the two samples have an identica winning percentage,one is significant and the other is not. Explain why the two samples lead to different conclusions.
you have received a year end bonus of 5000. you decide to invest the money in the stock market and have narrowed your
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